Abstract: The invention proceeds from a rotating electric machine, in particular a double-fed induction machine in the power range between 20 MVA and 500 MVA, which comprises a rotor that rotates about a machine axis, is concentrically surrounded by a stator, and has a rotor plate body and a shaft, which rotor plate body bears a rotor winding that is arranged further outwards and is connected by means of connectors to slip rings that are arranged further inwards at the end of the shaft. A flexible and secure connection is achieved in that the connectors have mechanical connectors that run at right angles to the shaft to absorb forces arising owing to centrifugal acceleration, which mechanical connectors are connected on one side to a rotor winding head of the rotor winding and are supported on the other side on an auxiliary rim on the rotor plate body.

Abstract: Disclosed herein are an armature for fuel pumps and a manufacturing method thereof, in which a polymer coating film is formed on an armature core such that the armature has corrosion resistance to an alcohol fuel and to a highly corrosive fuel.

Abstract: In general, one aspect of the subject matter described in this specification features a torquer apparatus that includes a rotor with magnetic poles such that, when radially projected on a concentric octahedron, the same symmetrical pattern is obtained on all faces of the octahedron, the polarity of the poles projected on two adjacent faces of the octahedron being opposite. A stator with at least twenty poles magnetized with coils and such that, when radially projected on a concentric icosahedron, the same symmetrical pattern is obtained on all faces of the icosahedron, the stator being-in nominal position-concentric with the rotor. Real-time measurements, or equivalent information, of the position of the rotor with respect to the stator, and real-time measurements, or equivalent information, of exported torque from the stator, or of the orientation of the rotor with respect to the stator can be obtained.

Abstract: A motor arrangement between the movable body and the commutation system comprising movable body coils assembling, wherein said movable body coils assembling are energized for short periods of time of an electric cycle in order to initiate a movement at the movable body. The current applied to the coils assembling is stopped during a passive phase in order to complete a rotary motion based primarily to the magnetic relation between the static body and the movable body, more particularly the magnetic relation between the coils assembling and the permanent magnets in order to reduce the heat and energy consumption and therefore increasing the motor life.

Abstract: An annular bus ring assembly for connecting main rotor windings of a generator to the exciter diodes includes a plurality of annular bus rings with tabs bent over forming plurality of pads mounted on either side of a dielectric hub. The pads of annular bus rings clocked at an angle to each other to generate a pattern of plurality of pads on a equal angle spacing on a diameter to connect to the diodes by wire rope leads and a pattern of two connection at 90° spacing to connect to main generator leads.

Abstract: A brushless slip ring has a first conductive rotating member, and a second conductive non-rotating member that is positioned a predetermined distance away from the first conductive rotating member. A conductive semi-solid material electrically couples the first conductive rotating member to the second conductive non-rotating member. The semi-solid material is configured to transfer electric current from the rotating member to the non-rotating member.

Abstract: A fuel pump includes a pump portion for pumping fuel. The fuel pump further includes a magnet having magnetic poles circumferentially alternate with each other. The fuel pump further includes an armature on a radially inside of the magnet. The armature includes a rotor core provided with a coil formed of a wire. The armature is rotatable for driving the pump portion. A commutator, which is in a substantially disc shape, is provided to an axial end of the armature for rectifying electricity supplying to the coil. The rotor core has an axial end having an outer circumferential periphery defining a commutator-side collar portion extending toward the commutator. The coil is formed by winding the wire between an outer circumferential periphery of the commutator and the commutator-side collar portion.

Abstract: A method is disclosed for converting a commutator exciter, also called to as a DC machine, into a brushless exciter while keeping one part of the rotor as well as the stator frame of the DC machine. In an embodiment, the method also keeps the field currents and the time constants of the DC machine so that the exciter's voltage regulator may be kept. Alternatively, the magnetic cores of the DC machine stator poles may also be kept.

Abstract: The electrically-conductive element, in particular for a rotary collector, for transferring electrical current between two parts (2, 24) that are movable relative to each other is covered in one or more layers of electrically-insulating enamel (42), with the exception of an electrical continuity zone (43). The layer(s) of enamel (42) is/are removed, e.g. by chemical, thermal, or mechanical attack. The enamel (42) is selected from the group comprising: polyvinyls, polyurethanes, polyesters, polyester imides, polyamide imides, and polyimides. The layers may be the same or different in chemical nature.

Abstract: In a DC-motor according to the present invention, contact areas of first brushes can be enlarged without enlarging the external diameter of a disk on which a commutator is provided; therefore, the wear resistance of the first brushes can be enhanced while maintaining a good control-response; and at the same time, the axial dimension can be shortened dramatically, so that the DC-motor can be downsized. The first brushes 14 are radially in contact with the commutator 11, and second brushes 15 are axially in contact with slip rings 12 that are formed circumferentially inside the commutator 11.

Abstract: In a DC-motor according to the present invention, contact areas of first brushes can be enlarged without enlarging the external diameter of a disk on which a commutator is provided; therefore, the wear resistance of the first brushes can be enhanced while maintaining a good control-response; and at the same time, the axial dimension can be shortened dramatically, so that the DC-motor can be downsized. The first brushes 14 are radially in contact with the commutator 11, and second brushes 15 are axially in contact with slip rings 12 that are formed circumferentially inside the commutator 11.

Abstract: In accordance with a computer program product, apparatus and a method there is provided a redundant network wherein a host computer operates with a plurality of storage devices by monitoring conditions of the multipath storage network and controlling a storage multipath device driver in conjunction with an associated storage multipath device input/output (I/O) pending queue to increase I/O throughput to a storage device driver, such as a disk device driver, when I/O demand increases, and to decrease I/O throughput to the storage device driver in the event of an I/O error condition.

Abstract: Metallic laminations for magnetic circuits. Some of the illustrative embodiments may be a magnetic circuit comprising a low reluctance magnetic flux path comprising a plurality of stacked metallic laminations (each lamination having an edge), and an air gap in operational relationship to at least a portion of the edges of the stacked metallic laminations (wherein magnetic flux flows at least partially through the stacked metallic laminations and the air gap). Adjacent edges of the stacked metallic laminations are intentionally offset by an amount greater than manufacturing tolerance of edge position for the stacked metallic laminations to improve eddy current loss occurring from lamination-to-lamination contact at the edges.

Abstract: A direct current motor including a rotor having a rotation shaft and rotor coils, a stator configured to apply a magnetic field to the rotor via magnetic poles of the stator opposing magnetic poles of the rotor, an electrical parts mounting base board fixed on the rotation shaft such that the rotation shaft perpendicularly intersects the electrical parts mounting base board, and a commutator having a contact electrode part formed with a plane conductive layer pattern and connected to the rotor coils. The contact electrode part is formed on the electrical parts mounting base board. The direct current motor further includes a pair of electrode brushes in sliding contact with the contact electrode part of the commutator and configured to supply electric power to the rotor coils though the commutator.

Abstract: A rotary transformer has a bus duct assembly that extends through the hollow shaft of a rotary transformer from collector or slip rings positioned above a drive motor for the rotary transformer to end windings of the rotor positioned most remote from the drive motor. By positioning the leads of the bus duct connection with the rotor end windings on the rotor end windings most remote form the drive motor, the shaft strength and integrity is not reduced due to the torque applied by the drive motor. Further, the shaft is formed from two coupled shaft sections and the bus duct assembly comprises two L shaped sections each positioned substantially within a corresponding shaft section. The bus duct sections are interconnected to complete the bus duct assembly making it simpler to remove the first or upper shaft section from the second or lower shaft section during field servicing.

Abstract: One current passing circuit board is constituted by one metal plate in which a continuous current passing pattern that is to be separated in a plurality of current passing patterns is formed, and molded resin in which the metal plate is inserted. The current passing circuit board is pressed to eliminate the unnecessary portions of the above mentioned current patterns, thereby the one current passing circuit board is formed in a state where the current passing pattern continuously formed is separated in the normal forms.

Abstract: A homopolar machine produces an axial counter force on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counter force is produced through magnetic interaction between the shaft and the machine's field coils and is created by changing the current excitation of the field coils, which results in a magnetic flux asymmetry in an inner flux return coupled to the shaft. The homopolar machine may also have a configuration that uses current collectors that maintain substantially constant contact pressure in the presence of high magnetic fields to improve current collector performance. The current collectors are flexible and may be made from either electrically conductive fibers or stacked strips such that they bear up against the armature so that the pressure is maintained by the spring constant of the current collector material.

Abstract: A rotary transformer system (20) comprises a rotatable shaft (28) having at least one and preferably plural electrically conductive slip rings (27) mounted thereon. The slip rings (27) of the phase planes are electrically connected to their respective windings on rotor assembly (22) by the bus conductors (80). The bus conductors (80) extend through respective phase isolated bus ducts (82) formed interiorly in rotatable shaft (28). The bus ducts (82) have a buffer (146) provided therebetween so that the bus ducts (82) are not in physical contact, but are spaced apart and separated. A mouth (160) and annulus (162) of each bus duct (82) extend through a cover plate (164). The cover plate (164) is secured by fasteners (166) through insulated spacers (167) and is held slight aloft above the circumference of rotatable shaft (28), thereby insulating cover plate (164) from rotatable shaft (28). The cover plates (164) of adjacent bus ducts (82) are electrically connected by a flux plate (170).

Abstract: A dynamoelectric machine 20 includes a rotor assembly 24 and a main lead insulating assembly 26. The rotor assembly 24 includes a shaft 28 having a main lead receiving recess 32 in its outer surface, a rotor 30 mounted to the shaft 28, and a stator 22 surrounding the rotor 30. The main lead insulating assembly 26 lines the main lead receiving recess 32 and includes at least one insulating bottom block 34 axially secured to the shaft 28 and at least one insulating sidewall block 40 secured to the at least one insulating bottom block 34 with at least one interlocking joint 42. A main lead 35 is received in the main lead insulating assembly 26.

Abstract: A method and apparatus for creating a groove in the surface of a collector ring for use in an electrical device. The method and apparatus can be used to create a new groove in the surface of a collector ring having none, or can be used to enhance or re-form an existing groove in the surface of a collector ring. In some embodiments, the groove in the surface of the collector ring is created using a cutting tool that has a cutting action that functions independently from the motion of the collector ring. In other embodiments, a masking material is positioned over a portion of the surface of the collector ring to create a masked portion and an exposed portion of the surface of the collector ring. A groove is then created in the exposed portion of the surface of the collector ring. The masking material is then removed from the surface of the collector ring.

Abstract: A small brush motor able to use a three-electrode varistor and able to suppress disconnection or short-circuits of crossover wires of coils, wherein each phase coil of the three-phase coil of an armature uses three risers and two salient poles, each phase coil has a zigzag part formed by alternately bending and connecting successively to the front side, back side, and back side the three salient poles in the interval from the knotting part of the first riser in the forward rotation direction to the knotting part of the second riser, a first coil part formed by winding from the knotting part of the second riser in the reverse rotation direction and wrapping at the adjoining first salient pole, and a second coil part comprised by winding from the first coil part in the forward rotation direction and wrapping at the adjoining second salient pole and connects to a knotting part of the adjoining opposite phase first riser extending from the second coil part in the forward rotation direction, the winding directions

Abstract: A homopolar machine produces an axial counterforce on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counterforce is produced through magnetic interaction between the shaft and the machine's field coils and is created by changing the current excitation of the field coils, which results in a magnetic flux asymmetry in an inner flux return coupled to the shaft. The homopolar machine may also have a configuration that uses current collectors that maintain substantially constant contact pressure in the presence of high magnetic fields to improve current collector performance. The current collectors are flexible and may be made from either electrically conductive fibers or stacked strips such that they bear up against the armature so that the pressure is maintained by the spring constant of the current collector material.

Abstract: The present invention relates to a pump driving system of induction type, which comprises a motor shaft, a pump shaft, a first magnetization body, a second magnetization body, an electrical coil, a yoke, and a nonmagnetically electrical-conducting body. The first magnetization body is mounted on the first shaft and is driven by the first shaft. The second magnetization body is provided inside a seal cover that is provided at one end of the pump shaft. The first magnetization body, the second magnetization body, the electrical coil, and the yoke are configured to constitute a dosed magnetic path. The rotation of the motor is configured to change the magnetic flux of the closed magnetic path to have the nonmagnetically metal disk, which is coupled with mechanical means, induced eddy current and thus exert an electromagnetic force on the disk so as to rotate the second.

Abstract: Structure of driving unit in a drum type washing machine including a tub mounted inside of a cabinet, a drum mounted inside of the tub, a shaft connected to the drum mounted inside of the tub for transmission of a driving force from a motor to the drum, a front bearing and a rear bearing mounted on an outer circumference of the shaft at opposite end portions thereof respectively, a bearing housing built in a central portion of a rear wall of the tub for supporting the front bearing, a rotor composing the motor together with the rotor, and coupled to the rear end portion of the shaft, a stator fixed to the tub rear wall inward of the rotor to compose the motor together with the rotor, a connector serration coupled to the outer circumference of the shaft in front of the rear bearing and fixed to the rotor, for transmission of a rotating power from the rotor to the shaft, and a bearing bracket fixed to the rear wall of the tub to cover an outside of the rotor and support the rear bearing, thereby reducing noise,

Abstract: An alternator adapted for use with a motor vehicle includes rotor assembly and a stator assembly, which may be like the rotor and state assemblies of brush-type alternators, and also a contact assembly that includes two relatively low-friction, electrically conductive, ball bearing assemblies that are adapted to conduct the DC exciting current for the alternator and that are electrically isolated from each other. Each ball bearing assemblies include inner and outer races that are electrically connected to each other by a plurality of bearing balls and by electrically conductive grease which is packed about the balls. The inner race of each ball bearing is rotatably secured to the rotary shaft of the rotor assembly and is connected to electrical leads which, in turn, are connected with the rotor assembly. The outer race of each ball bearing is fixed relative to the rotary shaft and is connected with a storage battery.

Abstract: A superconducting rotating machine has a relatively compact construction while still providing a relatively high output power, thus the superconducting rotating machine has an increased power density characteristic. The superconducting rotating machine includes a stator assembly, a rotor assembly configured to rotate within the stator assembly and having at least one HTS superconducting winding assembly which, in operation, generates a magnetic flux linking the rotor assembly to the stator assembly, and a refrigeration system for cooling the at least one superconducting winding. The superconducting rotating has a gap shear characteristic greater than 10 psi.

Abstract: An electrical current collector system (20) comprises a rotatable shaft (28) having at least one and preferably plural electrically conductive slip rings (27) mounted thereon. For each phase, a slip ring is paired with a fixed conducting ring assembly (44). The fixed conducting ring assembly forms an envelope within which slip ring-contacting members are situated. The slip ring-contacting members can take many forms, including brushes (240) or rollers (404). The fixed conducting ring assembly comprises a first conducting plate (200T) and a second conducting plate (200B) positioned parallel to one another to form a conductive ring channel (220) therebetween. The slip ring-contacting members (240, 404) are mounted in the conductive ring channel. An at least partially transparent wall (200W) extends between the first conductive plate and the second conductive plate of the fixed conducting ring assembly to further define the conductive ring channel and permit visual inspection of the slip ring-contacting members.

Abstract: An electric machine having a rotor carrying a field coil has a fan and slip ring assembly. The slip ring assembly is axially remote from the fan portion, the slip ring assembly being electrically connected to the field coil. The point of connection between the slip ring assembly and the field coil is secured to the fan by a thermoplastic retaining member that is ultrasonically welded to the surface of the fan.

Abstract: Printed circuit board 6, stator core 8, AC power source connector 14, step-down circuit 15, rectifier circuit 16, and control circuit 18 are molded into one piece using molding material 20 to form a stator. Rotor 9 is placed in stator core 8. DC high voltage from rectifier circuit 16 is supplied directly to stator coils 7 as a driving power source and DC low voltage from the step-down circuit is supplied to the control circuit as a control power source.

Abstract: The armature (26) has metal segments (42) separated from each other by grooves (46) distributed around its circumference on a front side thereof. Commutator covers (48) are placed on the segments (42) and soldered with the segments (42) in order to form the plane commutator (32). The commutator cover (48) has respective recesses (50) in its front side facing the metal segments, which correspond in their size and shape at least approximately to the segments (42). When the commutator cover (48) is assembled in the armature each segment (42) is inserted in a corresponding recess (50) of the commutator cover (48) and is soldered in the recess (50). Side surfaces of the segments (42) facing in the circumferential direction and edge surfaces pointing radially inwardly are covered by the commutator covers (48). The commutator covers (48) are positioned exactly by the metal segments (423) inserted in their recesses and are separated from each other by comparatively small slots (56) in the armature.

Abstract: In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially behind the brushes (6), such that the magnetic field (M) deflects the moving charge carriers in the brushes (6), to thereby reduce the current density at the trailing edges (6.2) of the brushes (6).

Abstract: A dynamo-electric machine satisfies an expressionR.sub.eq .gtoreq.(.rho..sub.0 .multidot.(r1*.tau.)/(S/3))*(2.5)where .rho..sub.0 (.OMEGA..multidot.m) is the resistivity of armature coil, S (m.sup.2) is the cross-sectional area of the conductor portions thereof, r1 (m) is radius of rotation of the connecting portions between equalizers and armature circuits, namely the armature coil, risers, or commutator segments, .tau. (rad) is the pitch of pole pairs, and R.sub.eq (.OMEGA.) is the resistance value of the equalizer.

Abstract: A flat commutator for an electric motor of a vehicle fuel pump. The commutator, is made with a one-piece carbon ring having a flat outer face, a one-piece conductor ring underlying the outer face of and embedded in the carbon ring, and a housing of a plastic insulating material molded on the rear face and the inner and outer edges of the carbon ring and adapted to mount the commutator on a motor armature. A plurality of circumferentially spaced apart grooves extend radially and axially completely through both the carbon ring and the conductor ring to provide a plurality of individual sintered carbon segments each with a separate conductor for electrically connecting the segments with armature coils.

Abstract: A commutator is disclosed which is adapted to be mounted on a rotor shaft of an electric motor for cooperation with electrical contacts of the motor, the commutator being capable of accommodating two speeds of the motor. The commutator includes a support member formed of electrically insulating material and having a central opening for receiving the rotor shaft, the support member having a surface portion for attachment of commutator segments. A first plurality of circumferentially spaced, electrically conductive commutator segments are attached to the surface portion of the support member and are arranged in a generally circular array and wired to the armature to accommodate at least a first speed of the motor. A second plurality of circumferentially spaced, electrically conductive commutator segments are attached to the surface portion of the support member and are positioned radially outward of the first plurality of spaced commutator segments.

Abstract: A rotor for an electric motor, including a shaft (1), a lamination parcel (2) and a current distribution element (3), which are mounted on the shaft (1) coaxially therewith and for joint rotation therewith, and insulating sleeve members (4,5) coaxially mounted on the shaft (1) one behind another for insulatingly supporting, respectively, the lamination parcel (2) and the current distributions element (3) on the shaft (1).

Abstract: The invention relates to a rotating element of an electrical machine, rotating electrical contact parts and electrical machines containing these devices.

Abstract: An assembled commutator has a segment support portion and a housing portion. The housing portion has housing members formed with axially extending "T"-shaped recesses and transversely extending slots for receiving armature leads. Insulation displacing terminals are inserted in the "T"-shaped recesses and formed with slots which cooperate with the transversely extending housing slots to grip and contact the armature leads. The terminals may also be formed with recesses for receiving armature leads after the terminals have been placed in the housing portion and during the winding of the rotor. The terminals are held in place by commutator segments and include recesses for receiving retainers located on the commutator segments. The commutator segments may also include a carbon portion which surrounds a copper connection strip for connecting the terminals to the carbon portion of the commutator segment.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll is adaptable for use with a power source to assist in transporting the marking particles. The donor roll includes a rotatably mounted body having a particle transportation portion, a support portion adjacent the particle transportation portion, and an external portion adjacent the support portion and spaced from the particle transportation portion. The donor roll further includes an electrode member mounted on the body and an electrical connector associated with the support portion of the body and electrically connected to the electrode member. The electrical connector is adapted to be electrically connectable to the power source.

Abstract: A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll includes a rotatably mounted body and an electrode member mounted on the body. The donor roll further includes a magnetically permeable core external to the body. The core rotates with the body. The donor roll further includes an electrically conductive material positioned on the core. The material is electrically connected to the electrode member.

Abstract: A rotary actuator (1) with magnetically acting restoring element (18), particularly for controlling a throttle cross-section, is intended to be simplified in its structure and the torque variation of the restoring element (18) is to be improved. For this purpose, the restoring element (18) is constructed of ferromagnetic but not permanently magnetic, material and arranged in the area of the permanent magnet segments (10) of the motor actuator (2). Due to the asymmetrical construction of the restoring element (18) with three short arms (22 to 24) and one extended arm (25), the maximum torque generated by the element (18) is reduced and the restoring angle, from which the element (18) returns back into its desired locking position, is increased. The rotary actuator (1) is suitable, in particular, as rotary idling actuator for internal combustion engines.

Abstract: An apparatus for multi-axis rotational motion includes a spherical structure (102) and a housing (104), the housing (104) at least partially enclosing the spherical structure (102) and movably coupled thereto. Magnetically compliant poles (106, 107, 108, 109) are mechanically coupled to one of the spherical structure (102) and the housing (104), and a magnetic drive mechanism (114) is mechanicanically coupled to the other one of the spherical structure (102) and the housing (104) for magnetically imparting up to substantially 360 degrees of rotational motion between the spherical structure (102) and the housing (104) in multiple axes by magnetically interacting with the magnetically compliant poles (106, 107, 108, 109). Optionally, at least one of the spherical structure (102) and the housing (104) couples the rotational motion to another object (1906) mechanically coupled thereto via surface coupling.

Abstract: Disclosed is a rotary actuator having a rotor and a stator which rotatably supports the rotor. The stator includes a coil bobbin, a stator coil, a pair of tapered poles and a yoke. The coil bobbin is formed from a non-magnetic material into a cylindrical shape and has the stator coil wound circumferentially thereabout. The pair of poles are disposed on the internal circumference of the coil bobbin. The yoke covers the outer surface of the coil bobbin and is in contact with the respective poles. The rotor comprises a rotary shaft and a diametrically polarized cylindrical magnet. The rotary shaft is inserted into the coil bobbin and is rotatably supported by the yoke. The magnet is carried by the circumference of the rotary shaft and is rotatable integrally therewith.

Abstract: A light valve has a pair of rotating vanes for controlling the cross section of a light beam passing between the vanes. The vanes rotate on corresponding shafts, each controlled by its own integral motor. Separate feedback control systems produce electrical control signals to each motor for rotating each shaft independently of the other to control the desired phase angles of the vanes. In one embodiment, both motors are permanent magnet direct current servo motors in which the wound armature is an integral part of each shaft. A stationary magnetic field generated by permanent magnets is common to both motors. Power is supplied to each armature by a pair of thin, parallel, flexible, electrically conductive strips extending from an end of each shaft. The conductive strips reduce the torque on the shaft when twisted during operation. In one embodiment, the control system produces a calibrated digital control signal from a PROM representing the desired phase angles of the rotating blades.

Abstract: A current-conductor assembly for conducting a machining current to a wire electrode in a wire-cutting electroerosion machine comprises a pair of coplanar wheels rotatable about their respective shafts and having their respective peripheries for receiving the wire electrode between them. The wheels are urged towards one another to press the wire electrode between the peripheries and a brush connectable electrically to a source of the machining current and adapted to be urged under pressure into electrical contact with a flank of one of the wheels which is electrically conductive for conducting the current to the wire electrode. The brush is an electrically conductive body preferably composed of copper, graphite or a copper/graphits composite material containing a solid-state lubricating material, e.g. MoS.sub.2 or WS.sub.2. The pressing wheel urged towards the conducting wheel is, at least along its peripheral region, composed of an elastomeric material.

Abstract: The present invention relates to a distributor for an electric D.C. machine comprising a commutator associated with two elastically deformable conductor rings, each forming a wing placed above the commutator on the path of at least one roller carried by a moving element, each roller establishing, by elastic deformation of the corresponding ring, a mobile electrical contact between said ring and the commutator. The invention is more particularly applied to rotary machines.

Abstract: An electric motor having a low speed shaft that rotates at a speed much slower than the speed of a high speed shaft comprises a stator having a cylindrical bore with a longitudinal axis and a rotor that carries the low speed shaft and rotates in the bore eccentrically about the axis so that there is contact and no magnetic gap between a relatively small portion of the rotor periphery and the periphery of the bore. A magnetic field, rotating at the speed of the high speed shaft, is applied to the periphery of the bore. The field has longitudinally extending magnetic field components of opposite polarity so that around approximately 180.degree. of the bore the field extends in a first direction, while around the other 180.degree. of the bore the field extends in the opposite direction. The rotor includes permanent magnet pole faces at opposite ends of the bore.

Abstract: Disclosed is a DC motor comprising a rotor consisting of a rotary shaft, a disk carried by the rotary shaft coaxially thereof and a plurality of prefabricated coils mounted on the disk and equiangularly spaced apart from each other; brushes attached on the rotor and electrically connected to the coils and each consisting of carbon fibers; and a casing wherein commutator segments are mounted on the inner surface of the side wall of the casing and circumferentially equiangularly spaced apart from each other for sliding contact with the brushes and permanent magnets are mounted on the casing so as to surround or be surrounded by the coils in radially opposed relation therewith or to be in axially opposed relation therewith.

Abstract: An electromagnetic impulse motor having a stator and a rotor arranged for rotation relative to the stator. Permanent magnets are mounted on either the rotor or stator, while electromagnets are mounted on the other of the rotor and stator in order to cooperate the permanent magnets. A variable speed motor actuates a timing disc to pulse the electromagnets as a function of the speed of the variable speed motor to control the speed of rotation of the rotor of the electromagnetic motor.